FSpaceRPG article

Here is s nifty tool for planet builders to figure out the surface gravity of a world. Can also be used for stars and even huge alien mega structures - or a Mech class 1 or 2 vessel. You need to know the radius and average density of the object in question.

Radius of the body:
km (kilometers)

Average density of the body:

You can look up densities of materials here.)
Note: When comparing the density of actual materials to the average density of the body, remember that a material at the core of a body could be denser than normal due to pressure from the weight of the surrounding material.

Acceleration due to gravity at the surface of the body:
m/s2 (meters per second per second)
g (Earth gravities)